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Holley 553-122 CAN Speedometer

I have a Holley 553-122 CAN Speedometer along with a CAN Tachometer, oil pressure & water temperature gauge. I have a Holley 554-130 Gauge Module plugged into a Holley Terminator Stealth Kit.

I wired in a Hall-Effect speed sensor to the ECU, the signal feeds into Input #4. What's the best way to setup the speedometer input so the CAN Speedo will see the signal? Should I load the Transmission ICF? Or just make a custom channel in the I/O ICF?

I've used the HP EFI software to make some changes to the base tune. The combo has a Holley Dual Sync Distributor, and the thermostatic fans use the +12V switches Outputs to trigger the relays.

I'm not familiar with these CAN gauges, so you might have to contact Holley Tech Service (LINK). However, I think your custom Hall-Effect VSS ECU Input must be named "Speed", in order for it recognize the correct data channel. Is there any programming setup involved with this CAN Speedometer? (I hope you weren't supposed to purchase the Holley GPS Speedometer LINK.)

I thought it would be easier to use the speedometer signal from a VSS hooked to my ECU, than a GPS for the speedometer, as I can use the VSS for other features like control of thermostatic fans on the highway. I can see the speed signal at the ECU and on the handheld controller. The instructions for the speedometer as basically plug it in and power it up. I've logged it with Holley Tech. I'm starting to think it would work more so, if I had a Dominator ECU with a 4L60E or the like.

Response from Holley Tech: "Thank you for contacting Holley Tech Service. The easiest way to do this is through the I/O ICF. Then just setup the speedo that way. There is no need to setup a Transmission ICF, if you're not running an auto transmission. And, you can call the speedo whatever you wish. You just have to make sure you have the Pin Map correct for the input."

I can see the Speed channel on the 3.5” LCD Touchscreen, but only when viewing the I/O Gauge screen. I can't add it to a custom gauge setup, as it's not listed in the available channels to build a gauge from. It's a shame, as the tachometer, oil pressure & water temperature are working perfect and are true plug & play.

I can see the Speed channel on the 3.5” LCD Touchscreen, but only when viewing the I/O Gauge screen. I can't add it to a custom gauge setup, as it's not listed in the available channels to build a gauge from. It's a shame, as the tachometer, oil pressure & water temperature are working perfect and are true plug & play.

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